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प्रश्न
In addition to speed, what else should we know to predict the position of a moving body ?
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उत्तर
Besides speed, we should know the direction to predict the position of a moving body.
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संबंधित प्रश्न
During an experiment, a signal from a spaceship reached the ground station in five minutes. What was the distance of the spaceship from the ground station? The signal travels at the speed of light, that is, 3 × 108m s−1.
Under which condition is the magnitude of average velocity equal to average speed ?
Arrange the following speed in increasing order (keeping the least speed first):
A bicycle moving with a speed of 200 m/min.
A car is moving on a straight road with uniform acceleration. The speed of the car varies with time as follows :
Time (s) : 0 2 4 6 8 10
Speed (m/s) : 4 8 12 16 20 24
Draw the speed-time graph by choosing a convenient scale. From this graph :
(1) Calculate the acceleration of the car.
(2) Calculate the distance travelled by the car in 10 seconds.
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The speed of a car is 72 km h-1. Express it in m s-1.
How many variables are present in each equation of motion?
Distinguish between speed and velocity.
